a live look at san francisco. temperatures expected to reach freezing and if you're driving around, get ready because there's the potential for black ice on the road. we bring in our chief meteorologist jeff ranieri who has been tracking the cold and i know you keep saying this. the key to this is layers. >> yes, layer up. three to four 0 of them the next couple of mornings. our latest storm system is arriving. not too much moisture back behind it but major cold air will drop temperatures over the next two days anywhere from about 0 to 25 degrees. even tracking some slick conditions. throughout oakland, down the peninsula, spotty showers that will make it down throughout san jose. there's not going to be a whole lot of moisture left but we are looking at snow levels dropping to 1,000 feet. you are at the greatest risk. a dusting expected, even some black ice if you're traveling throughout the east bay and the north bay. if you're heading south to the coastline, a rare and unusual coastal snow advisory at least in